CVE-2025-29943 Memory corruption in AMD EPYC™ 8004 Series Processors
An admin-privileged attacker can corrupt the stack pointer in SEV-SNP guests by modifying CPU pipeline configuration, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-29943?
CVE-2025-29943 is a medium-severity memory corruption vulnerability in AMD EPYC™ 8004 Series Processors, published on 16 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Write what were condition within AMD CPUs may allow an admin-privileged attacker to modify the configuration of the CPU pipeline potentially resulting in the corruption of the stack pointer inside an SEV-SNP guest.
Weakness: CWE-123
Which versions are affected by CVE-2025-29943?
How do I fix CVE-2025-29943?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-29943 being exploited?
There is no known exploitation of CVE-2025-29943 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as BELL-CVE-2025-29943, DEBIAN-CVE-2025-29943, GHSA-4vw8-pffj-q9x7, UBUNTU-CVE-2025-29943.